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Erschienen in: Journal of Cancer Research and Clinical Oncology 5/2003

01.05.2003 | Original Paper

p53 expression and resistance against paclitaxel in patients with metastatic breast cancer

verfasst von: M. Schmidt, A. Bachhuber, A. Victor, E. Steiner, M. Mahlke, H. A. Lehr, H. Pilch, W. Weikel, P. G. Knapstein

Erschienen in: Journal of Cancer Research and Clinical Oncology | Ausgabe 5/2003

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Abstract

Purpose

Paclitaxel is an important agent in the pharmacological treatment of metastatic breast cancer. Despite its efficacy in selected patients, the majority of patients have a resistance against paclitaxel. The aim of this study was to identify the responding patients and hence prevent the other patients from ineffective treatment. Identifying these patients could spare them an ineffective treatment and could in turn characterize a subgroup of patients with a higher response rate.

Material and methods

Thirty-three patients with metastatic breast cancer received paclitaxel 175 mg/m2 either as first- (15 patients) or as second-line (18 patients) treatment. Immunohistochemistry was performed on the blocks of the primary tumors with monoclonal antibodies against p53, HER-2/neu, P-glycoprotein, Glutathione-S-Transferase-π, and β-tubulin II. The expression of those factors was then correlated with the objective response to paclitaxel.

Results

Ten of 33 patients had an objective response to treatment. A significant correlation with the objective response was found for the expression of p53. None of the tumors with p53 expression (n=11) responded to paclitaxel. In contrast, 10 of the 22 patients without p53 expression showed an objective response (P=0.013). Expression of HER-2/neu, P-glycoprotein, Glutathione-S-Transferase-π, and β-tubulin II did not show a correlation with the response to paclitaxel.

Conclusion

The immunohistochemical detection of p53 characterizes patients with metastatic breast cancer unlikely to respond to paclitaxel.
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Metadaten
Titel
p53 expression and resistance against paclitaxel in patients with metastatic breast cancer
verfasst von
M. Schmidt
A. Bachhuber
A. Victor
E. Steiner
M. Mahlke
H. A. Lehr
H. Pilch
W. Weikel
P. G. Knapstein
Publikationsdatum
01.05.2003
Verlag
Springer-Verlag
Erschienen in
Journal of Cancer Research and Clinical Oncology / Ausgabe 5/2003
Print ISSN: 0171-5216
Elektronische ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-003-0430-1

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